<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <% if(isLogin){ %>
    <span>欢迎回来</span>
    <% }else{ %>
    <button>登录</button> <button>注册</button>
    <% } %>
  </body>
</html>
